Hi, I could `btrfsck --repair` the sparse file with Linux 3.15.6-utopic from http://kernel.ubuntu.com/~kernel-ppa/mainline/ and btrfsck 3.12-1 (from btrfs-tools package in Ubuntu 14.04). Thanks for your hints, Wang! All the best, Karl Am 18.07.2014 14:13, schrieb Wang Shilong: > > Hi, > > There are some patches for fsck flighting, they are integrated in David's branches. > You can pull from David's latest branch, and see if it helps: > > https://github.com/kdave/btrfs-progs integration-20140704 > > Have a try and see if it helps anyway. > > Thanks, > Wang > >> Hi together, >> I'm experiencing the following issues when I invoke `btrfsck` on a >> sparse file image with a GPT and one (the only) btrfs partition attached >> to a loop device >> >> $ sudo btrfsck --repair --init-csum-tree --init-extent-tree -b >> /dev/loop0p1 >> Incorrect local backref count on 128510738432 root 5 owner 3849475 >> offset 0 found 1 wanted 0 back 0xbab41270 >> backpointer mismatch on [128510738432 4096] >> ref mismatch on [128510742528 12288] extent item 0, found 1 >> btrfsck: extent_io.c:612: free_extent_buffer: Assertion `!(eb->flags >> & 1)' failed. >> >> $ sudo btrfsck --repair --init-csum-tree --init-extent-tree /dev/loop0p1 >> Incorrect local backref count on 128510726144 root 5 owner 3849470 >> offset 0 found 1 wanted 0 back 0xbbcb9500 >> backpointer mismatch on [128510726144 12288] >> ref mismatch on [128510738432 4096] extent item 0, found 1 >> adding new data backref on 128510738432 root 5 owner 3849475 offset >> 0 found 1 >> Backref 128510738432 root 5 owner 3849475 offset 0 num_refs 0 not >> found in extent tree >> Incorrect local backref count on 128510738432 root 5 owner 3849475 >> offset 0 found 1 wanted 0 back 0xbbcb9630 >> backpointer mismatch on [128510738432 4096] >> ref mismatch on [128510742528 12288] extent item 0, found 1 >> btrfsck: extent_io.c:612: free_extent_buffer: Assertion `!(eb->flags >> & 1)' failed. >> >> $ sudo btrfsck --repair /dev/loop0p1 >> Incorrect local backref count on 130861096960 root 5 owner 22733727 >> offset 0 found 1 wanted 0 back 0xc7c7d170 >> backpointer mismatch on [130861096960 8192] >> ref mismatch on [130861105152 8192] extent item 0, found 1 >> btrfsck: extent_io.c:612: free_extent_buffer: Assertion `!(eb->flags >> & 1)' failed. >> >> $ sudo btrfsck --repair /dev/loop0p1 >> Backref 130861096960 root 5 owner 22733727 offset 0 num_refs 0 not >> found in extent tree >> Incorrect local backref count on 130861096960 root 5 owner 22733727 >> offset 0 found 1 wanted 0 back 0xc7f31170 >> backpointer mismatch on [130861096960 8192] >> ref mismatch on [130861105152 8192] extent item 0, found 1 >> btrfsck: extent_io.c:612: free_extent_buffer: Assertion `!(eb->flags >> & 1)' failed. >> >> I'm using `btrfs-progs` 24cf4d8c3ee924b474f68514e0167cc2e602a48d on >> Linux 3.16-rc5 (anything else, i.e. older versions, give me immediate >> error after start because errornous file system) >> >> I'd like to know whether this (assertion) error is related to a bug or >> missing feature in btrfs-progs and might be fixed at some point or >> whether this might indicate a completely messed up btrfs. >> >> Best regards, >> Karl-P. Richter >> >
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